A. Go to Company Setup. Then, go to PO Tab. Enable the edit option from the top right corner of the screen. Click on find and enable the options “Edit Option In Approval Required For”. You can give the edit option to all the approvals or else you can give edit to 1st ,2nd or 3rd aprroval as per the requirement.
Once done, edit option is visible in Action field and click on edit option, you can edit the required field you have been given the access for making further changes.